# AVIOBOOK TECH vs DHC

The clearest difference is update cadence: AVIOBOOK TECH at every 2 months against DHC's every 8 months. DHC's advantage is iOS requirement (13.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AVIOBOOK TECH ships an update every 2 months, DHC every 8 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | AVIOBOOK TECH | DHC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 8 months |
| Size | 220 MB | 92 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [AvioVision](https://appshunter.io/developer/568400284) | [De Havilland Aircraft Company of Canada Limited](https://appshunter.io/developer/1503054078) |

## What reviewers say

### AVIOBOOK TECH

[App page](https://appshunter.io/ios/app/aviobook-tech/id1336964720)

**In-app purchases:** none


### DHC

[App page](https://appshunter.io/ios/app/dhc-mobile-maintenance/id1503350127)

**In-app purchases:** none


## Frequently asked questions

### Is AVIOBOOK TECH free?

AVIOBOOK TECH is free to download, with no in-app purchases.

### Is DHC free?

DHC is free to download, with no in-app purchases.

### Do AVIOBOOK TECH or DHC have ads?

Neither AVIOBOOK TECH nor DHC shows ads.

### Which is updated more often, AVIOBOOK TECH or DHC?

AVIOBOOK TECH ships an update every 2 months, and DHC every 8 months. Most recently, AVIOBOOK TECH was updated on October 26, 2026 and DHC on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*